feat: add localization support for SingleDatePicker and adjust month selection behavior

playground/App.vue

@@ -8,7 +8,7 @@ const date = ref(new Date())
 <template>
   <div>{{date.toDateString()}}</div>
   <div class="container">
-    <SingleDatePicker v-model="date" />
+    <SingleDatePicker v-model="date" localization="zh-CN" />
   </div>
 </template>
 

src/components/SingleDatePicker.vue

@@ -36,7 +36,7 @@
 	})
 
 	const emit = defineEmits(['update:modelValue'])
-	const selectMonth = ref(true)
+	const selectMonth = ref(false)
 	const uniqueId = generateUniqueId()
 	const currentMonth = ref(new Date().getMonth())
 	const currentYear = ref(new Date().getFullYear())